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Definition of slope

i. The entry, passage, or main working gallery of a coal seam that dips at an angle.

See Also: incline

ii. Inside slope.

iii. See gradient.

iv. An inclined passage driven from the dip of a coal vein. When not open at one end to the surface, it is known as an inside slope.

See Also: incline, plane

Compare with: slant

v. The inclination of a mine roadway or coal seam.

Ref: Nelson

vi. The main working gallery or entry of a coal seam that dips at an angle and along which mine cars are hauled.

Ref: Nelson

vii. An entrance to a mine driven down through an inclined coal seam; also, a mine having such an entrance. An inside slope is a passage in the mine driven through the seam by which coal is brought up from a lower level.

Ref: Korson

viii. In a mining statute or in mining parlance, an inclined way, passage, or opening used for the same purpose as a shaft. Sometimes used to embrace the main haulage passageway, whether inclined or level.

Ref: Ricketts

ix. The degree of inclination to the horizontal. Usually expressed as a ratio, such as 1:25, indicating one unit rise in 25 units of horizontal distance; or in a decimal fraction (0.04); degrees (2 degrees 18'); or percent (4%). It is sometimes expressed as steep, moderate, gentle, mild, flat, etc. Also called gradient.

Ref: Hunt

x. In surface mining, the steepest possible slope of an excavation that is consistent with safety of working.

Ref: Mining

xi. An inclined passageway (tunnel) from the surface, through the strata, that intersects the coal bed to be developed.

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